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Extract from the Register of European Patents

EP About this file: EP1438804

EP1438804 - PUBLIC KEY CRYPTOGRAPHIC METHOD BASED ON BRAID GROUPS [Right-click to bookmark this link]
Status	No opposition filed within time limit Status updated on 09.02.2007 Database last updated on 11.04.2026
Most recent event Tooltip	14.08.2009	Lapse of the patent in a contracting state New state(s): BE	published on 16.09.2009 [2009/38]
Applicant(s)	For all designated states FRANCE TELECOM 6 Place d'Alleray 75015 Paris / FR
	For all designated states CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE -CNRS- 3, rue Michel-Ange 75794 Paris Cedex 16 / FR
	[N/P]
Former [2006/13]	For all designated states FRANCE TELECOM 6 Place d'Alleray 75015 Paris / FR
	For all designated states CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) 3, rue Michel Ange 75794 Paris Cedex 16 / FR
Former [2004/30]	For all designated states FRANCE TELECOM 6, Place d'Alleray 75015 Paris / FR
	For all designated states CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) 3, rue Michel Ange 75794 Paris Cedex 16 / FR
Inventor(s)	01 / GIRAULT, Marc 4, rue Viviane F-14000 Caen / FR
	02 / MISARSKY, Jean-François 126, rue de Bayeux, Escalier 5 F-14000 Caen / FR
	03 / DEHORNOY, Patrick 11, impasse du Vivier F-27180 Arnières Sur Iton / FR
	04 / SIBERT, Hervé 17, rue Robert le Magnifique 14000 Caen / FR
	[2004/42]
Former [2004/30]	01 / GIRAULT, Marc 4, rue Viviane F-14000 Caen / FR
	02 / MISARSKY, Jean-François 126, rue de Bayeux, Escalier 5 F-14000 Caen / FR
	03 / DEHORNOY, Patrick 11, impasse du Vivier F-27180 Arnières Sur Iton / FR
	04 / SIBERT, Hervé 26bis, rue du Régiment de Maisonneuve F-14123 Fleury Sur Orne / FR
Application number, filing date	02791896.0	24.10.2002
	[2004/30]
	WO2002FR03665
Priority number, date	FR20010013787	25.10.2001 Original published format: FR 0113787
	[2004/30]
Filing language	FR
Procedural language	FR
Publication	Type:	A1 Application with search report
	No.:	WO03036863
	Date:	01.05.2003
	Language:	FR
	[2003/18]
	Type:	A1 Application with search report
	No.:	EP1438804
	Date:	21.07.2004
	Language:	FR
	The application published by WIPO in one of the EPO official languages on 01.05.2003 takes the place of the publication of the European patent application.
	[2004/30]
	Type:	B1 Patent specification
	No.:	EP1438804
	Date:	29.03.2006
	Language:	FR
	[2006/13]
Search report(s)	International search report - published on:	EP	01.05.2003
Classification	IPC:	H04L9/30	[2004/30]
	CPC:	H04L9/3066 (EP,US); H04L9/30 (KR); H04L9/3221 (EP,US)
Designated contracting states	AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE, SK, TR [2004/30]
Extension states	AL	Not yet paid
	LT	Not yet paid
	LV	Not yet paid
	MK	Not yet paid
	RO	Not yet paid
	SI	Not yet paid
Title	German:	KRYPTOGRAPHISCHES VERFAHREN UNTER DER BENUTZUNG ÖFFENTLICHER SCHLÜSSEL BASIEREND AUF DEN GRUPPEN DER ZÖPFE	[2004/30]
	English:	PUBLIC KEY CRYPTOGRAPHIC METHOD BASED ON BRAID GROUPS	[2004/30]
	French:	PROCEDE CRYPTOGRAPHIQUE A CLE PUBLIQUE BASE SUR LES GROUPES DE TRESSES	[2004/30]
Entry into regional phase	08.04.2004	National basic fee paid
	08.04.2004	Designation fee(s) paid
	08.04.2004	Examination fee paid
Examination procedure	09.04.2003	Request for preliminary examination filed International Preliminary Examining Authority: EP
	08.04.2004	Examination requested [2004/30]
	15.09.2004	Despatch of a communication from the examining division (Time limit: M04)
	13.01.2005	Reply to a communication from the examining division
	27.04.2005	Communication of intention to grant the patent
	28.07.2005	Fee for grant paid
	28.07.2005	Fee for publishing/printing paid
Opposition(s)	02.01.2007	No opposition filed within time limit [2007/11]
Fees paid	Renewal fee
	26.10.2004	Renewal fee patent year 03
	28.10.2005	Renewal fee patent year 04
Opt-out from the exclusive Tooltip competence of the Unified Patent Court	See the Register of the Unified Patent Court for opt-out data
	Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition Tooltip	AT	29.03.2006
	CY	29.03.2006
	CZ	29.03.2006
	EE	29.03.2006
	FI	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	TR	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	GR	30.06.2006
	PT	29.08.2006
	LU	24.10.2006
	BE	31.10.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
	[2009/38]
Former [2009/03]	AT	29.03.2006
	CY	29.03.2006
	CZ	29.03.2006
	EE	29.03.2006
	FI	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	TR	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	GR	30.06.2006
	PT	29.08.2006
	LU	24.10.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
Former [2008/37]	AT	29.03.2006
	CZ	29.03.2006
	EE	29.03.2006
	FI	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	TR	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	GR	30.06.2006
	PT	29.08.2006
	LU	24.10.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
Former [2008/28]	AT	29.03.2006
	CZ	29.03.2006
	EE	29.03.2006
	FI	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	GR	30.06.2006
	PT	29.08.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
Former [2008/21]	AT	29.03.2006
	CZ	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	GR	30.06.2006
	PT	29.08.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
Former [2007/50]	AT	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	PT	29.08.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
Former [2007/39]	AT	29.03.2006
	IE	29.03.2006
	IT	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	PT	29.08.2006
	CH	31.10.2006
	LI	31.10.2006
	MC	31.10.2006
Former [2007/19]	AT	29.03.2006
	IE	29.03.2006
	NL	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	PT	29.08.2006
Former [2007/12]	AT	29.03.2006
	IE	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	PT	29.08.2006
Former [2007/11]	AT	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	DK	29.06.2006
	SE	29.06.2006
	PT	29.08.2006
Former [2007/03]	AT	29.03.2006
	SK	29.03.2006
	BG	29.06.2006
	SE	29.06.2006
Former [2006/48]	AT	29.03.2006
	BG	29.06.2006
	SE	29.06.2006
Former [2006/46]	AT	29.03.2006
	SE	29.06.2006
Former [2006/43]	AT	29.03.2006
Cited in	International search	[A] ANSHEL I ET AL: "AN ALGEBRAIC METHOD FOR PUBLIC KEY CRYPTOGRAPHY", MATHEMATICAL RESEARCH LETTERS, vol. 6, 1999, pages 1 - 5, XP002208338, Retrieved from the Internet [retrieved on 20020801] [A] 1-3,6,7 * page 1, line 23 - page 2, line 23 * * page 3, line 15 - line 16 * * page 4, line 9 - line 21 *
		[A] ANSHEL I ET AL: "New key agreement protocols in braid group cryptography", TOPICS IN CRYPTOLOGY - CT-RSA 2001. THE CRYPTOGRAPHERS' TRACK AT RSA CONFERENCE 2001. PROCEEDINGS (LECTURE NOTES IN COMPUTER SCIENCE VOL.2020), TOPICS IN CRYPTOLOGY - CT-RSA 20001, SAN FRANCISCO, CA, USA, 8-12 APRIL 2001, 2001, BERLIN, GERMANY, SPRINGER-VERLAG, GERMANY, PAGE(S) 13 - 27, ISBN: 3-540-41898-9, XP002208339 [A] 2,3 * page 18, line 21 - page 20, line 3 * * page 22, line 11 - page 23, line 5 *
		[AD] KI HYOUNG KO ET AL: "NEW PUBLIC-KEY CRYPTOSYSTEM USING BRAID GROUPS", ADVANCES IN CRYPTOLOGY. CRYPTO 2000. 20TH ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE, SANTA BARBARA, CA, AUG. 20 - 24, 2000. PROCEEDINGS, LECTURE NOTES IN COMPUTER SCIENCE;VOL. 1880, BERLIN: SPRINGER, DE, PAGE(S) 166-183, ISBN: 3-540-67907-3, XP001003403 [AD] 1-3,6,7 * page 170, line 13 - page 171, line 14 * * page 173, line 14 - page 174, line 13 * * page 174, line 33 - page 177, line 36 *

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